“Jumping bear,” Fallon, 39, captioned the photo of his firstborn, clad in a cozy pink romper, complete with little ears.

The new dad — he and his wife Nancy welcomed Winnie via surrogate in July — has said that while the couple’s path to parenthood, which included several failed fertility treatments, was hard, it was all worth the wait.

“I just love her. She’s a little angel. She’s so cute and so fun,” Fallon said in August. “Little girls especially unlock something in your heart.”